1. dth bit with DHD, COP, MISSION shank 2. dth bit with QL, SD, XL,and MACH shank 3. dth hammer bit with IR, CIR, Bulroc shank DTH HAMMER BIT----All of our down the hole drill bit is made of 100% vergin raw material with good quality. That makes the drilling performance is amazing. Besides, various shanks for your better choice.Specifications:1) shank: CIR, DHD, COP, MISSION, QL, SD, XL,and MACH2 ...